Only download the form type VARCHAR2 column numbers

Hello
How can I extract only numbers form varchar2 column type?
I have data like below.

25 - Abc
233 - xyz
x23A
9 - dd

I need following output
25
233
23
9

Thank you
Sujnan
Advertisement

Hi try this

SQL> with t as(select '25-Abc' test_string from dual union all
  2  select '233-xyz' from dual union all
  3  select 'x23A' from dual union all
  4  select '9-dd' from dual)
  5  select regexp_substr(test_string,'[[:digit:]]+') from t;

REGEXP_
-------
25
233
23
9

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